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Q: IGNITION COIL on 2005 Chevrolet Monte Carlo

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CAN I FIND OUT WHICH IGNITION COIL IS MISFIRING AND IF SO CAN I REPLACE JUST THE ONE
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Your engine is a V6 that shares a coil per two cylinders (3 coils total). A scan tool is needed to verify which cylinder is experiencing a miss fire ie a code P0301 is cyl 1 mis fire, P0302 is cyl 2 misfire, P0303 is cylinder 3 misfire ect.....
Roy is right mis fire could be due to other things an injector not firing a vacuum leak, a plug or plug wire.
if in fact it is the coil. you need the code for the cylinder missfiring and need to eliminate the plug and wire before looking at the coil.

Roy
If you are willing to pull the spark plugs 1 at a time. Look for the dirty 1 and start there by replacing it.
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